Across
- 3. the spectrum of wavelengths
- 5. light behaves as this
- 7. stars moving away look this
- 8. Each color and sound has one
- 10. stars moving close look this
- 11. CMB has a wavelength of this
- 12. makes up 25% of the Universe
Down
- 1. residue from the Big Bang
- 2. makes up 74% of the Universe
- 4. discovered redshift
- 6. It is 13.7 billion years old
- 9. came up with the phrase, "Big Bang."